Machine eor making concrete blocks



W. H. CAREY MACHINE FOR MAKING CONCRETE} BLOCKS May 1, 1923 Filed April 15 1922 9 Sheets-Sheet 1 WITNESSES ATTO R N EY May 1, 1923-.

w. H. CAREY mc'umu FOR mmiua concurs BLOCKS Filed April 15 1922 9 Sheets-Sheet 8 A1TORNEY WITNESSES May], 1923.- v 1,453,147

W. H. CAREY Maxims ron mum coucns'rsamcx's Filed April 15 1923 9 Sheets-Sheet -4' INVENTOR,

AT! ORNEY 3% l l W -u l l WI'TNESSES May 1, 1923. 1,453,747

w. H. CAREY MACHINE FOR MAKING CONCRETE BLOCKS Fild April 15, 1922 9 Sheets-Sheet 5 INVENTOR' WITNESS ATTORNEY May 1, 1923. 1,453,147

' W. H. CAREY MACHINE FOR MAKING: CONCRETE BLOCKS H. 7634 s 75 w 6 & k

s 1 T v Q INVEN OR, WITNESSES $2 Mm q ATTORNEV May 1, 1923.

' w. H. CAREY MACHINE FOR MAKING CONCRETE BLOCKS Filed April 15, 1922 9 Sheeis-Sheet 7 q QR R r CW'%INVI: NTOR,

ATTORNEY WITNESSES May 1, 1923.

W. H. CAREY mourns FOR MAKING coucma'm BLOCKS Filed April 15 1922 9 Shasta-Sheet 8 ATTORNEY i ialiwl x, m: H & my

wmssa WW my 111,, 123. v W. M. @SAWEW MACHINE FORWIAKING CONCRETE BLOCKS Filed April 15, 1922 9 Sheets-Smut w WWW Z BY A Patented May 1, 1923.

WIIil'iliAl'lllI H. CAREY, OF WISCONSIN RAPIDS, WISCONSIN.

MACHINE FOR MAKING CUNCRETE BLOCKS.

Application filed April 15, 1922.

To all 7 7mm it may concern Be it known that I, VVILLTAM H. Ci innit, a citizen of the United States, residing at lVisconsin Rapids, in the county of lVood and State of lVisconsin, have invented a new and useful Machine for Making Concrete Blocks, of which the following is a specification.

This invention relates to brick making machines for forming hollow or solid concrete blocks, and has for its object the provision of a novel machine for forming, ouring and removing the bricks from the molds in a continuous mechanical operation.

Another object of the invention is to provide a battery or series of b'ick forming machines, in which, all the mold carriers are operated by a single shaft; all the molds are filled from a single hopper; and the finished bricks are removed by a single travcling; mechanism common to i the several machines and movable transversely of the battery or series.

Another object of the invention is the provision of means for filling the molds directly from. the hopper mounted above the molds, and simultaneously subjecting the molds to a jarring action, which in connec tion with the weight of the concrete material. in th hopper, causes the production of a concrete block of great density and at a low cost.

Another object is the provision of a jarring means which decreases in intensity as the molds are moved away from the hopper.

Another object of th invention is the provision of an improved form of mold. mounted in a series of rows upon a traveling carrier. each mold having its sides flexibly mounted and capable of separation from the cured bricks at a predetermined point in the travel of the carrier whereby the bricks or blocks may he picked from the molds or readily disl'iarged from the same.

Another object of the invention is the provision of a cooling means which will not rust the molds or traveling; mold carrier. but will shrink the cores sutliciently, so that the lu'icks may be readily removed from the molds.

Lill

Another object of the invention is the pro- Serial No. 552.980.

chamber into which the molds containing the blocks are moved and wherein they are subjected to the action of any kind of artificial. heat, preferably steam for curing or hardening them for a number of hours.

The invention will be best understood from a consideration of the following detailed description taken in connection. with the accompanying drawings forming part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing in the drawings, bu tmay be changed and modified so long as such changes and modifies, tions mark no material departure from the salient features of the invention as expressed in the appended claims.

In the drawings l ig. l is a side elevation of the forward end of my machine for making concrete blocks.

Fig. 52 is a side elevation of the rear end of the same.

Fig. 3 is a plan view of that part of the machine disclosed in Fig. 1.

Fig. 4-

a fragmentary view partly in section of the tracks and that portion of the traveling' carrier provided with molds.

Fig. 5 is a plan view of the rear end of the traveling carrier disclosing the single shaft for driving; a plurality of traveling carriers for a series of machines.

6 is a plan view of the picker or unloading mechanism and the gravity roller carrier for the finished bricks.

Fig. 7 is a side view partly in section disclosing: the rear end of the traveling; mold carrier and the driving sprocket.

Fin. 8 a side elevation of the rear end of the machine cooperating: with an endless belt for discharging solid bricks from the machine.

Fin. 9 is a plan view of the device for rc- (waiving: and disclnirn'ing the solid bricks.

Fig. "10 is a vertical cross section of the steam chest or curing chamber.

l ipg. ll is a vertical. longitudinal section mold for forming hollow bricks.

Fin. 1?. is a plan view of the same.

Fig. 1.3 is a transverse vertical section of the mold.

l ig. 14-. a vertical cross section taken through the driving; sprockets located beyond the rear end of the steanii chest. the travch ing carrier being provided with molds for ill) Elf)

llltl lltl forming hollow bricks, and disclosing my improved means for flexing the bases of the molds.

Fig. 15 is the same view as disclosed in Fig. 14, but showing the traveling carrier provided with molds for forming solid bricks and the means for causing the sides of the molds to be forced out of engagement with the cured bricks.

Fig. 16 is a sectional view of the movable sleeve at the bottom of the hopper.

Fig. 17 is a side view of one of the packing and leveling rolls.

Fig. 18 is a transverse section through the hopper, mold carrier and proximate parts.

Fig. 19 is a front end elevation of the curing chamber disclosing a filler in the entrance to said chamber which is used when a door is dispensed with.

Fig. 20 is a fragmentary view in detail disclosing a vertical section of the forward end of the curing chamber and a gravity oper- 'ated closure for the same.

Referring to Figs. 1 and 2 of the drawings, 1 indicates the floor to which are secured pairs of spaced vertical standards 2, 3, 4 and 5, one at each side. Upon the upper ends of the spaced standards 2 are mounted horizontal beams 6 having their other. ends secured to a point on the standards 3 intermediate their ends, and forming a support for open frames 7 in each of. which is slidably mounted a bearing block 8 for a shaft 9 disposed transversely at the forward end of the machine. Loosely mounted. upon the shaft 9 are a pair of spaced sprockets 10 for supporting the forward end of the traveling mold carrier 11. A screw 12 mounted in each ofthe frames 7 is adapted to adjust the bearing blocks 8 to maintain the traveling carrier 11 taut. Diagonally disposed braces 13 secured at opposite ends to the standards 2 and 3 are adapted to brace said stamlards.

The spaced vertical standards 4 and 5 support horizontal beams 14 which carry bearings 15 for a drive shaft 16. (Fig. 2.) The shaft 16 carries a. pair of spaced sprockets 17 by which the traveling carrier 11 is driven. Braces 13 are employed for bracing the standards 4: and 5 in position. the same as standards 2 and 3.

Each of the spaced sprockets 10 and 17 are provided with semi-circular grooves or channels 18, engaged by grooved wheels 19 of the carrier 11. said wheels riding upon spaced rails 20 when the traveling carrier 11 is moving in its overhead position. The diameter of the grooved wheels is substantiall v identical with the diameter of the semicircular grooves 18. whereby the wheels will find a firm seat in the grooves, and when so engaged the traveling carrier 11 is driven by the sprockets 17.

The forward ends of the spaced rails-2) rest on a transverse Lbeam 21 forming an anvil, and are freely movable between guides 22 mounted on the anvil 21. The inner or other ends of the rails 20 rest on an anvil 21 supported by a standard 3 just outside of the steam chest or curing chamber 23 and are pivotally connected by a strap 24 and bolt 21 to the extended ends of rails 26 secured to the anvil 21 whereby the forward ends of the rails 20 may be osc llated. (Fig. 1.)

Rails 26 are disposed in alinemcnt with and slightly spaced from the inner ends of the rails 20 and secured to offset portions of the steam chamber 23 and extend longitudinally through the latter and beyond the other end of said steam chest. where the projecting ends of said rails are mounted upon a transverse beam 27 supported by the vertical standards 4. (Fig. 2.) The rails 26 in the steam chest are fastened to the chest by bolts which are passed downward through the floor of the chest and locked in place by nuts. Gaskets are employed on the bolts to prevent leakage of steam.

The rails 20 are mounted so as to be raised and dropped by mechanism to be presently described. The rails 26 are rigidly mounted and have no movement.

A carriage 28 having wheels 29 is adapted to ride on spaced rails 30 rigidly supported in any approved manner transversely above the traveling carrier 11. Said carriage sup ports a hopper 31 having a contracted lower end 32 which depends below said carriage. The month of the contracted portion 32 of the hopper 31 is sufficiently wide to span two rows of molds 33, and long enough to embrace within its side edges the full length of said rows of molds, as shown in F ig. 3.

In practice. where a very large output is required. I employ a series of machines arranged side by side and driven by the shaft 16. In consequence, the rails 30 extend transversely across the mold carriers of the several machines so that the hopper 31 may be moved along the rails by means of the carriage 28 and thus fill in succession any group of molds located on any one of the machines. In other words, the hopper supplies all the machines with concrete.

Mounted at one side of the hopper 31 on the carriage 28 is a motor 34 adapted to drive a spur wheel 35 which is in mesh with a gear wheel 36 mounted upon a shaft 37. ()n the outer ends of said shaft are secured cams 38 against which the upturned fingers 40 of the levers 41 are adapted to ride. said levers being pivotally mounted on the carriage 29 at 43.

Figure 3 shows the cams 38 and levers 41 duplicated, one at each side. The other end of each lever 41 is pivotally connected by means of a link 44 to a shaker arm 45. which has an inwardly bent finger 46 engaged beneath'the spaced vrails 20 in rear lln steam chest, the jarring; ceases.

of the anvil 21.. whereby when the lingers ot the lovers 41 are depi. seed by the cams 38, the links 44. and shaker arms 45, together with ii ers 4-6, which. are duplicated as shown in l ig. 18, are elevated, raising the rails 20 as well as the traveling carrier ill and the molds 33. hen the lingers e20 reach the low part of the cams 38, the levers ell will return to their normal position. while the forward ends of the rails 20 will suddenly drop back upon the anvil 2i, causing, a deciocd ar to the traveling carrier 11 and the molds 33. which are traveling beneath the hopper 31 and being); filled with concrete from said hopper.

The cams Elli are :uilapted to be rotated. about one hundred times a minute so that a periodic raising and sudden dropping of the "ails 20 will be maintained, the -forward ends oi the rails being; elevated at least a quarter of an inch. All the molds passing; over the rails 20 will be likewise raised and dropped, which, because oi the construction and. position oi the hopper causes a repeated. jarot the plastic concrete in the hopper. The molds 33, are filled directly from the hopper 3i, and they close the bottom of the hopper (Fig. 153), so that the concrete in the molds is borne upon by the weight of all the concrete in the hopper Bl, and it exerts a pressing; action on the concrete in the molds.

Since the inner end of each rail 20 is immovably secured at 24, the n'iolos trzwcliir over the rails will be jarred to the full extent at the point along); the rails 20 where the rails are elevated and dropped suddenly on the anvil 21. As the molds pass from this point, they will be jarred. with a force which gradually diminishes in proportion to the distance that the molds move away from the anvil 2i, and when the carrier begins to travel on the rails 26 at the entrance ot the No jarring action is given to the molds utter they have entered the steam chest A sleeve 4:7, mounted to slide in a vertical direction on the neck or contracted portion 32 off the hopper 31, is provided with a rectangular trams 48 secured to its lower end, the front and rear e. of the frame cariyine; rollers 4-9 and 50. respectively, which are adapted to traverse the upper edges ot the molds 33 the carrier travels alone; and roll or pack the top surface ot the formed concrct blocks within the molds El -l and remove any excess con-- crete.

The sleeve 41:? is elevated when the molds 3S and the rails 30 are raised by the arms 41-5, since the rollers 49 and. 50 rest on the upper edges of the molds, and the sleeve with the frame 48 provides a loose joint between the neck portion of the hopper 31 and the upper or es oil: the molds. The sleeve tit closes the space between the bottom of the hopper and the molds and prevents the con crete dropping; from the hopper from spill inn. (l ig.

The construction and further functions o? the rollers l9 and 50, and the sleeve 4:7. which are disclosed more fully in Figs. 1b and 17, will be presently described. in connection with a description of the molds 33 with which these elements have special cooperation.

The pivoted connections between links it and arms so permit arms l5 to be folded back upon said links when the hopper 31 is moved. on the rails 80 to another machine.

The hopper 31 is filled with a plastic mixture of concrete which is continuously sup-- plied to said hopper by means of buckets of a well lrnown construction and carried to said hopper by a carriage rolling on rails 51., which are mounted in. spaced rela tion above the top of the hopper 31. I have not thought it necessary to show this as is the ordinary construction.

The concrete which is especially adapted for forming the bricks in my improved brick making machine is what 1 term a normal consistency mixture. and which when. lie-- lerred to as such throughout the specifica tion and. claims, designates a nurture formed by adding only a suiiicient amount of water, no more, no less, to the concrete than is necessary to provide a concrete inii;- ture of ideal plastic consistency, which produces the strongest and most waterproof product possible. to distinguish it from he sloppy or wet mixture; or the damp mixlure having iusrdlicient water. which can only be employed in other known brick inalring machines and which machines are not capable oi using the normal consistency mixture as indicatedv above.

The molds. which are adapted. to :torm the hollow bricks and which are. placed six in a row andv in a se ics ct at least 9150 rows along a portion ot the endle s traveling carrier. are each :t'orrned of a hollow metal core having; slanting sides 53 and. a top 55, and a horisontal marginal the ge 56 at the open end. out the core 52, the longitudinal side edges ot the flange being welded to flanged base portion 57 of longitudinal ver tical sides 58 oil the mold. (Fig. ll. 12 and. The molds are placed with their ad jacent sides in abutting relation and. welded together, so that in etlect the weld-- ed sides "Form a. co" non side tor adjacent molds in the row. (-Uicept the end sides 60 oi": the molds located. at the ends oi. each row. (l 10.) lhese end sides are welded to sides (it which torn the extreme outer ends of a row of molds while the flanges 5'7 on the lower edge of sides are welded to that portion of the m2. 'nal llll the core which isadjacent to the sides 60.

A lug 62 is provided'near the lower edge of each side 61 of the end molds of a row, and has a pivotal connection with a pair of ears 63 by a pin 64. The ears are rigidly mounted upon the top plate 65 of each of the channel-shaped links 66, which form part of the flexible mold carrier 11. The adjacent ends of the sides of the links are pivotally connected together by pins 67, the pins 67 forming the axles for the grooved wheels 19. which support the mold carrier on the rails 20 and 26. The links are cut away at each end as shown at 68 in Fig. 7, tormingreduccd portions 69 ot' the sides of the channel-shaped links at each end thereof, whereby a small amount of movement or play is permitted between the links when they reach the loose sprockets 10 and the driven sprockets 17.

Upon the pins 67, and in engagement with the sides of the links 66, are pivotally mountedears 70 of a U-shaped support 71, (Figs. 7 and 10), providing a supporting means for the opposite outwardly-disposed bases 72 of the .cross division plates 73, which bases and ears form a protective covering for the wheels 19 to prevent concrete "from falling on said wheels. A pair of the cross division plates 73 are welded together and in effect form a single cross division plate or common end between adjacent rows of molds. as shown in Figs. 7 and 10. The top 76 of the U-shaped support 71 is in clined downwardly from its. center (Fig. 7) so that the inclined bases 72 of the cross division plate 73 will. neatly fit on said top and are secured thereto in any approved manner. Since the cross division plates 73 are secured to the U-shaped covering 71, which is bivotally mounted on the pin 67,

they will be free to oscillate at certain times during the movement of the carrier. The ends of base flanges 57 of longitudinal vertical sides 58 will rest upon the bases 72 of the cross division plates 73, whereby the rows of molds are supported transversely of the traveling carrier.

Pivotally mounted on. the outer longitudinal sides 61 of the end molds of a row, are latches 77, the intermediate portions of which are adapted to be seated within a slot 78 (Figs. 14 and 15) adjacent the ends of each of the cross division plates 73 and engaged by keepers 77, (Fig. 1), formed on the ends of the sides61 which is opposite to the pivotal point of the latches, whereby the sides 61 of the end molds are not only locked in position but are maintained. in alinement. The latch of one side engages the keeper of the next adjacent side, by end of flange 80 on latch 77. An outstanding flange 80 is located on the lower edge and near the free end of each of the latches 77. One end of said flange engages the keeper, thus locking molds in position. As the molds pass from the steam chest 23, carrying the cured bricks 79, these flanges are adapted to engage trip bars located upon opposite sides of the mold carrier and each having an inclined portion 82, and a horizontal portion 83. (Fig.7.) The trip bars are mounted rigidly upon standards 84, which are in turn attached to beams cured to and projecting outwardly from the ends of the rails 26. \Vhen the flanges 80 of the latches 77 reach the inclined portion 82 of the trip bars, as shown in Fig. 7, they will ride upwardly and release the latches 77 from the slots 78, whereby the inter mediate longitudinal sides 58 and the outer sides 61 of the molds will be forced away from the sides of the bricks 79, when the traveling carrier is passing over the sprockets 17, at which time the bases of arow of molds are engaged by the curved heads of transverse bars 86 7 and H), which connect the spaced driven sprockets 17 and thereby cause the flexing of said bases. The curvature of the sprocket, as the traveling carrier engages the same, will likewise cause the rows of molds to be separated from each other and the cross division plates 73 from contact with the molds in adjacent rows.

The circumference of the sprockets is so proportioned with relation to the space between the transverse centers of adjacent rows of molds, and likewise between two adjacent bars 86, that the curved heads of said bars will always engage the transverse center line of the bases of the molds. (Fig. 7.)

Due to the fact that the pivotal point 64 of the end sides of a row of molds is located above the horizontal plane of the base of a row of molds, the lower edges of the end sides of the molds will swing inwardly towards each other, while the top edges will swing outwardly when the curved heads of the transverse bars 86 engage with and flex the bases of a row of molds.

Since the cross division plates 73 would fall forward by gravity and remain in contact with next forward row of molds passing downward over sprockets 17, I provide corrugated springs 87 mounted horizontally upon the standards 84 and at opposite sides of the mold carrier for engaging the cross division plates 73. retarding the same and preventing their interference with the jaws of the unloading mechanism in gripping the bricks. (Fig.7.) The free endofcach spring is corrugated, and it engages the end of the cross division plate which projects beyond each side of the end mold and thus retain the cross division plates against the cured bricks in the succeeding row. when the molds begin their travel around the sprockets 17. Before the free ends of the springs 87 leave the ends of the cross division plates, a dislit) chrrrg ginp; or unloeding mechanism co the cured bricks and. removes the same.

As shown in Fig. 53, when the briclrs have been removed. by said unloading); mechanism 88, the hitches 77 will tend to tell by gravity to o position which is opposite to their normoi positions while the molds are passing beyond the horizontal plane with respect to the shaft 16 the sprocket 1?. Blocks or stops 89, mounted on each oi. the sides ($1 of the end molds, engage the latch s 77 and limit the rearward movement oi. 5521' Then the molds have passed yond the driving; sprocket 1'7, they will. pass above a track 90, fl and 2), and tho latches [7 will engage said tznclr and. he returned to near their normal. position, so that :is the molds are carried upwzirdlv by the s /roclrets 10, at the Forward end or the machine, the latches will tell by gravity back to their normal positions until they come beneath the rollers end 50, where they will he dopressed and forced again into the respective slots 78 adjacent the ends or the cr vision plates 73. When the wheels 19 ot the carrier 1i ore riding on the mils $20 the longg itudinsl sides of the molds will be returned to their normal. vertical positions, since the hoses oi. the molds will then be horizontally positioned.

As shown in Fig. iii", the rollers 19 and are provided with spaced annular grooves 181, adapted to engage the upper edges or the intermediate longitudinul sid 2; I58 oi the. hollow or solid brick molds in such o msnnor that the upper edges oi said sides will not only ride in sari d grooves, but the intermediate sides of the molds in succeeding),- and preceding rows of molds will be sliced and held in ploce while being filled with the normal consistency concrete 'iiOU'l hopper Hi. The outer ends oil the rollers are reduccd in diameter, shown at 182, which reduced portions are adopted to ride on the upper edges of the outer sides 61 of the end molds and the latches 'i"? for torcing' said latches into their respective slots 78 provided adjacent the .ends oi. the cross division plates 73.

Cooperating; with the zuinul r grooves ltl'l of the rollers l-S and 50, and dining the in termediete sides 59 ot' the molds while being; filled by the hopper 31, are spaced notches 183 "formed in the lower edges of the front and rear wells oi the slidoble sleeve l? ot the hopper end in elinement with the grooves 181 of said rollers. The lower edges of the longitudinal sides 184-. oil? the sleeve il, together with the opposite ends of the lower edges 01"". the front and rear walls of the sleeve, cut away to term grooves 185, in which the upper edges of outer sides of the end molds and the latches '77 ride.

The grooves it'll oi" the rollers end the grooveslllil ol' the sleeve ore wider st the entrance then at the base oi the grooves, whereby the sides ere sloped, the grooves gradually narrowing; until just enough room is had at the hose or": the grooves for the intermediate sides 58 to pass. The object of this is to provide suilicient width at the mouth of the grooves to engage side of any mold that may be out of line, and force the some in proper vertical position. It will only be necessary to employ this form of groove having the enlarged. moutl'i in roller 419 and at the receivor front wall of. the sleeve The grooves in the rollers 4.9, 50 end the front and rear wells of the sleeve 47 are designed to hold the intermediate side walls oi the molds in line while being; filled. After they c filled, the concretefivill hold them in line. The outer walls of the end moles of each row are held rigid by the hitches engaged in the slots adjacent the outer ends of the cross division plates.

The cross division plates 73 sire about 1 below the level of the tops oi the intermediate side walls 58, and the portion of the rollers L9, 50 between the grooves lfill, also the portion of sleeve between notches 185% acting; es :1 strike-oil, will ride in the molds below the tops of the intermediate side walls and thereby act as an auxiliary compacting means for the concrete in the molds, and likewise as umesns lior leveling; off the tops of the green concrete blocl it roller it may be employed to imprint the name and address of the manufacturer, end as such will. be located just at the en trance to the steam chest, and rotate-lily mounted on the outside of door 198, :it :i point in the travel of the mold. carrier where all vibration hes cease l. Fig. 20. This roller is shorter than width of the molds so that the roller may ride on top edges of the intermediate side wells of the molds and do not tench the side wells and elilect the latches, {1S do the rollers d5) and 50.

ll hen the trovelin carrier is equipped with molds for forming solid. bricks, a di:l-- rerent form oil mold. sea", as shown in 15. instead of weldinet wo pieces to rm 2. common longitudinal side, the sides are spaced sport as shown at 92, their ill. upper edges end ends liieing welded to en intermediate longitudinal bar 93 which has vertically bent portions 93 welded between the ends of adjacent sides oi? the molds.

The lower oi the sides 91 are spaced apart rind form on opening for the circuletion of steam to the specs 92 between the sides of the mold. Instead oi directly weldingr the adjacent intermediate sides 58 ol a hollow briclt mold together soown in l i lq they may be spaced sport by :1 horizontal. bar 9 3 with depending vertical side bars which produces s construction similar to that disclosed in l ig. to for ill) lUi') lill r solid brick molds, thereby leaving a space between the sides 58 for the circulation of steam, and an opening between the lower edges of said sides connecting the space to the outside. This spacing of the sides of the molds of the hollow brick type is especially necessary when a single machine is used, since it will hasten the curing of the bricks in the curing chamber. These solid brick molds are made of one piece bent intermediate its ends at right angles, the lower edges being bent outwardly at right angles providing flanges 94 and form a support for the base 95 of the mold and to which flanges said base welded. The outer sides 96 of the end molds of each row are pi'votally mounted at 97 to ears 63, which are formed upon the top plates intermediate of the ends of the channel-shaped links 66 of t-he mold carrier. The pivotal mounting of the sides 96 of the molds for forming solid bricks is identical in everv respect with the mounting of the sides 61 of the end molds for forming hollow bricks. The latches 77, the slots 78 for said latches, and the cross division plates 73, are similarly employed in this construction, with the ends of the bases of the molds resting upon the base flanges 72 of the cross division plates.

Thesteam chest or curing chamber 23 is provided at the front end with a gravity closure 98 of any approved construction, which is adapted to drop into closing position after the last mold in the series has passed within the steam chest. It is noted thatfirst and last molds 33 have an inclined face or wall, as shown in Figs. 1 and 2, and are what are known as dummies. A similar door 99 is mounted to work in the same way as the other end of the steam chest, and which is adapted to be maintained in closed position while the molds are located within the chest and being cured. A weight, as 99*, may be mounted on said door in order to aid in closing the door and resisting any pressure tending to force it open other than the pressure exerted by the dummy 33, when the inclined face of the moving dummy engages the door and opens the same. In this way, the steam chest is kept closed. Internal pressure on the door 98 will maintain said door closed.

As shown more particularly in Fig. 10, a gable roof is preferably provided for the curing chamber or steam chest, in order that steam, which has been condensed on the inclined walls 100 of the roof will drain downwardly from the roof along the sides 101 of the curing chamber, and through the passages 74 into a pit 102, forming the bottom of said chamber, and which has inclined sides 103 forming a trough for the reception of the Water condensed from the steam. Oflset ledges 25 disposed at opposite sides of the pit 102 support the rails 26 above the level of the water, so that the steam which enters the pipe 104 has sufiicient space above and below the molds to circulate and thereby properly cure the bricks in the molds.

Pipe 104, being perforated at intervals along the pit 102, is connected to any source of steam supply and carried through one wall of the steam chamber and downwardly to the pit 102, and along the latter. Drain pipes 105 having a controlling valve 106". pass through a side wall of the curing chamber and above the level of the steam pipe .104 and are adapted to drain off any water within the pit 102 which rises above a certain level within the steam chest. Another drain pipe 105, having a trap 100 and a valve 106", is connected to the bottom of the pit whereby the pit may be completely drained of water. Traps 100 are connected with the drain pipes 105 and 105 to prevcnt the escape of steam from the chest through the drain pipes.

The valves in the several drain pipes permit the closing of one of the other pipes when water is being drained from the pit by one pipe. The drain pipes may be preferably located centrally of the length of the curing chamber.

Spaced along the longitudinal side walls 101 of the steam chest are formed openings which are closed by slabs 107 of concrete, having their peripheral edges beveled and in engagement with a packing 10b to prevent the steam from escaping. Metal plates 109 engage the outer faces of the slabs 107 and are held in place by means of bolts 110. which go clear through walls of concrete forming the sides of the steam chest, with their threaded ends projecting outwardly from the walls 101 and passing through periorations in the plates 109. Nuts engage the threaded ends of the bolts 110 to maintain the plates 109 and the slabs 107 in p -l tion.

These removable slabs 107 serve as closures providing access to the interior of the steam chest, whereby it is possible for a workman to enter the steam chest when it is necessary to make repairs or for some other useful purpose. The steam chests are supported by pairs of spaced legs 111, which are located at intervals throughout the length of the steam chest, and supported upon the ground or floor 1 of the brick making shed.

As the heated molds with the cured bricks pass from the steam chest. after several hours of steaming, the bases of the molds are sprayed by some cold fluid such as oil, through a pipe 112 having a nozzle 112. in order to cool and thereby contract the corcs. (Fig. 2.) The cured bricks may then be readily removed from the contracted molds. A trough 113 is located adjacent the uppcr loo mean iv edge ol the pipe 112 to catch the spent 'lluid which drops oil the bottoms of the molds after being sprayed. A pipe 11d returns the warm fluid t, a cooling mcai s. Oil is preferred because it will not rust the molds.

A drip pan 1. .5 is located below the spaced sprockets 17 so that any fluid not caught by. the drip pan 113 will. lind its way into the pan 115 and he carried by a pipe 116 to the cooling station.

In the case of hollow bricks, the fluid is sprayed into the open bottom ot the cores 52 of the molds, whereby the total area oi? the core is reached by the tluid and thereby cooled and contracted from the lin'icks.

As shown in l lo. 15. which shows-i the molds for forming solid bricks, the spaces 92 between the sides 91. of the molds, when the molds are in the steam chesz, permits steam to circulate in these spaces. thereby acceleratiug the hardening and curing); of the product.

At the forward end of the brick or look making machine, and beneath the spaced sprockets 10, is another drip pan 117. which is adapted to receive fluid dropping from the moles and. the sprockets 10 and the chain 11. the fluid being sprayed onto the inner sides oi the molds by means ot' a tube l. 18 for the purpose oil preventing concrete sticking to molds. A pipe 119 carries the drained fluid baclt to a reservoir from whence it has been pumped.

Roilierrinpj to Fig. 2, a picliiinp; or unloadinc; mechanism 88, which is mounted upon a carriage 1520 provided with wheels 1221 to ride on rails 122. carries a motor 123 that is adapted to be rotated in synchron m with the movement of the traveling; carrier; that is, to produce about twelve actuations oil the mechanism per minute, so that said mechanism will engage the cured briclits at the proper time, since about twelve rows oi. bricks pass before the picking mechanism per minute. The speed may be increasei'l or diminished as desired. Tlhe rails are laid transver ly at the discharge or rea end ot the machine, or series of machines.

The motor operates the large gear 153% and pinion lilo, which in turn meshes with a gear 126. A. pulley 1537 is mounted on the shaft which carries the near 126. and drives an endless belt 128. which in turn drives an other pulley 129. On the shaft upon. which the pulley 129 is located is mounted a pulley 130, driving an endless belt 131 which in. turn drives a pulley 132, mounted on a shaft 133.

The shaft 133 .is rotatable in bearings upon a frame 134-, which rises from a table 135, secured to the carriage 120.

A pulley 136 is driven. by an endle. s belt 187 which in turn is oriven by a pulley 13E; mounted on be same shaft 13?, with the pulley 139.

llhe pulley 196 is mounted on a shalt 1539, carrying a pair of ca'ni incnibe s 1 M), which are oppositely disposed and engage the weighted arms 14:1 oi rocl l e veil-i 14-.3, pivotally mounted at 143 upon the frame 134. The cams are adapted to raise the weighted arms 1411 until the enlarged portion 144]: on; each arm 14:1 passes the high portion oi? the cams. when the arms l fll, by

reason o'l. the we' hts ill-5, will cause the arms 1 11 to descend. and thereby rocl: the

levers 1&2 to the right, the arrows in. Fig. 2.

As the 1452 are moved right. they aer e the support; for the picl-Ier or nnloadii the 1 19 of which. are in njrppiinp call iilenient with the cured lniclrs Y The aws will pick the bricks trom the cores 2: oi? the molds and carry tieoi to tile rip hl'. until the tripping mechanism 1.50 Lilies the adjustable roller 151, when the jaws are released. and the brick is deposited upon the traveling belt 152; which is driven by a roller 153 mounted on the shaft About the time that the brick has been deposited from the picking or unloading: mechanism 148., the centre 141:0 engage the portions 144: of the weighted arms 14-1. whereby the supporting rods 14'? are swims to the left by the roclterarms 142. and the jaws 14-9 will on he bricks urain in the next row of molds.

As shown in lligrs. 2 and 6, a shaft 186 driven by intermeshing gears 187 and 188. Gear 188 is mounted on shaft which is driven through a pulley 190 and an endless belt 191. the belt driven by apullcy on the shatt- The shaft 186 is p ovidcd with spaced cranks 1952,. which connected to the supporting? rods 14;? ot the picker mechanism. so that said rocs will be drawn upwardly and away from the mold, after the fingers i l-,9 have gripped the cured brick. Ellidable sleeves 14f are carried along the arms 14:7 by the levers 1452 to cause. the fingers 14:9 to drip the bricks, or to re-- lease the bricks at the primer moment. The periodic movements of the cranlirs 192 cai'zse the arms 1 17', and lilreiv rzac the jaws l l-llfto be directed towards the brick in the molds. as the sleeves I l-l are moved downwardly along the arms and thereby open said ifinpge or jaws in readine s to engage the oncoming bricks from which the sides of the mold have been released.

The inner ends ct side haw- 1 15 lot the curved gravity roller carrianie are pivotally' menu: .(I, on the shalt l lf l. l ip'. ill. on on. site sides of the roller 153. and are 1;;rovided with spaced rollers the free end 156 ol the side bars 154; bein adapted to be aced upon and supported by an inclined gravity roller or power belt conveyor 157. which is extended transn'erse'ly beyond the ends o' as indicated by s the r l M" IOU the brick making machine. Bricks or blocks which have .been deposited upon the traveling belt 152 by the picker mechanism are carried upwardly and outwardl by the belt to the gravity roller carriage and deposited thereon, said gravity roller carriage carrying the blocks downwardly on the gravity rollers 155 until they reach the end T56, where they will drop upon the roller or power belt conveyer 157, and are carried to anotherpart of the brick-making plantor shed. One end of the main gravity roller conveyer 157 is elevated by means of a frame or scaffolding 158. which is located in alinement with the end of the first brick-making machine.

When solid bricks are manufactured, the picking or unloadin mechanism and the corrugated spring 8' are dispensed with. Referring to Figs. 8 and 9, a guard 15.), which is curved concentrically to the driven sprockets 17, is spaced from the molds and! and maintained in position by a bracket 160 mounted upon the beam 14 at the rear end. of the brick-making machine. so that as the molds containing the solid bricks pas around the driven sprockets 17, the guard 15!) will maintain the bricks within the molds and prevent them dropping out, until the molds reach a point which is adjacent to one end of an endless belt 161, driven by a pulley'162 mounted at the most elevated point and at one end of a frame 163 mounted upon a carriage 164.

The carriage is provided with wheels 16:) riding upon rails 166. A motor 167 drives a plurality of intermeshing gears, which in turn drive a pulley 168, which connects by an endless belt 169 with the pulley 162. At the lower and forward end of the frame is mounted a pulley 170 mounted in adjustable bearings over which the endless belt 161 moves. As the solid bricks 1T1 drop upon the cndless belt 161, the are carried up 'ardly by said belt, and deposited upon a gravity roller carriage 1.72. pivotally mounted at its inner end on shaft- 173 upon which the pulley 162 and the driving roller 17a are mounted. The outer end 175 of the gravity roller carriage is adapted to bc placed upon a roller conveyor 15? similar to the conveyor shown in Fig. 6, and previously described, said conveyer being supported by a frame 158, so thatthe bricks moving down the gravity roller carriage 172, are deposited upon the roller conveyor 157, and carried to some other part of the brick making shed or plant.

\Vhile I have described a single brick making machine in which are included a number of co-related devices forming a continuous operation in the manufacture of bricks, as heretofore stated, I propose, where a very large output is required, to constru t a battery of machines comprising a plurality of these brick making machines disposed side by side, having all the traveling mold carriers operated by a single continuous shaft 16; clutches 177 on the shafts individual to the driving sprockets for the mold carriers; a single hopper common to all thc machines movable transversely of the battery of brick making machines for filling the molds of the traveling carrier; individual steam chests for curing the green bricks; and in the case where hollow bricks are formed, a single take-otf or unloading mechanism common to all the machines for picking the cured bricks from the molds as they pass from the individual steam chcsts. the picker mechanism being movablc on tracks located beyond the end of the battery of brick making machines; and a single gravity roller carriage for receiving the bricks from the picker or unloading mechanism. When solid bricks are manufactured. a single traveling carriage provided with a rcceiving belt for the cured bricks that are dumped from the molds, is employed. said carriage being movable on tracks adjacent the end of the battery of molds.

Six molds for forming hollow bricks are employed in a row of at least 250 rows on the endless mold carrier. the o rows or more comprising but a portion of the endless traveling carrier. and which portion of the car rier is slightly shorter than the len th of the steam chest so that when the mob s are run into the steam chest, the doors of said chest may be closed to confine the molds in the chest. Ten molds are employed in a row with at least 250 rows for forming solid bricks.

The operation of my device is as follows The clutch 177 is operated by a rod 178 having a handle 179 which is located adjacent the forward end of each brick-making machine of the battcry. (l igs. It and iii. and in a position where it may be conveniently reached by the operator. As the rod 178 is shoved inwardly, the bell crank [ever {so is operated to move the clutch 177 in engagement. whereby the driving sprockets l? of the first machine of the series are operated. As the traveling carrier it is moved. the first rows of molds will be brought beneath the sleeve 4.7 of the hopper 32, the rollers 4.? and will close the latches T7. while the sides of the molds will be held in alincment while being filled.

The hopper 31, which has been tilled with a normal consistency concrete. starts filling the rows of molds beneath the sleeve 47. whereupon motor 31 is operated at a speed which will drive the cams 38 about 100 revolutions per minute. and thereby oscillate the levers 41 and the arms 45 and raise the rails 20, the molds 33, the frame 18, and the till till

sleeve (t7. so that the concrete being filled. into said molds {tom the hopper 2-31 will not only be jarred and rannneth but willv be firmly pressed Within the molds fl by the rollers 49, 50. In add ion to this, the Weight of the concrete Within the hopper Ill. and sleeve 47, which is roused to rise and fall, exerts a ramming and pressing action on the material Within the molds. the molds 33 constantly in motion and are kept moving towards the entrance ol' the steam chest 23 at the rate (it at least eight feet a minute. or in other words. at least twelve rows of molds pass beneath the hopper per minute.

do far as I am. aware. it is novel in this art to subject the molds to a jarring: action multaneously with the filling ct 1e molds. and at the same time. utilize the weight oi"? the concrete in the hopper as a ram to i ncrease the compacting ot the concrete in the molds.

As previously stated. the jarring ot' the molds is greatest beiieatl'i the hopper. and it. dimii'iisl'ies in degree until. the molds reach the steam chest, Where it Wholly (cases. This is also a. novel 'leature cl tion.

The filling operation is continued until the last mold which is near the connecting end 33 ot" the carrier 11 is tilled. The a riaee 28 is then moved alone; the rails 30 until the hopper 31 is placed above another machine of the battery or over the first two rows ol' molds of said sectiom and the operatioi'i is resumed. Before moving the aarriaac as. the jigging: arms 45 are released from rails 20 and tolded back upon links hen all the molds have passed within the steam chest 28. both gravity-ope'ated doors 9S and 99 are drop ied to close the same, and steam is turned on through the perforated teed pipe 104-. and the green hrioks within the molds are lett to a caring; lnocss for several hours. l i hile the hriclis in the first machine are being? cured. the

this inreir molds of? adjacent machines are tilled and run into their rispective steam chests to be cured.

. rs l employ several oi liltltfllllltifl to term a battery. at about. the time that the molds ot the last machine of the batl ruu ill-lent. tune l may he s" ed to remove the molds 'From tie steam c u.

A cold. fluid through the teed p' t? sprayed upon the bases of the mold. the hollow cores 5 a to cool the more Li tract th m so that the out .linolds .may be resulily picked from the molds by the tzdre-oi'lf' mechanism 5- .8. [is the bricks are picked out of the molds by the takeoff :mechunism or dropped out as in the case of solid bricks. the carrie= 11 With the molds, continues its travel around the driving iprocltets fl? and beneath the steam chest, then :torimrdly to its initial position beneath the lillinp; hopper 31. which has been returned on. traclm 30 to the first niacl'iine after it led the molds ot the last machine of the battery. To prevent sticking the molds are sprayed on their inner sides with a lubricating; fluid just he'tore reacl'iing); the sproclwts 10. the surplus draining); ott insides ot molds to pan 11.7.

lit Will be understood that by the time the molds ot the first machine have reached the forward end oil. the first machine of the battery, sutlicient time will have elapsed tor the complete tillinp; of the molds ot the last machine and the return ol? the hopper to the lirst machine.

llt Will be seen that it is possible by my improved. battery of briclrmalrinp; machines to provide a continuous ope 'ation ot all. the machines in *uccarsion... and that by employinc: three shittts of men of eight hours each each p of men will operate one complete bettr-iry. lu tiventydour hot the battery he redilled and emptied three times. its the bricks are removed eithe. by the takeoli mechanism in the ease of hollow bricks. or by the endless traveling carrier 161 shown in Fig. 8 for solid bricks. the

hrielrs in either case are deposited upon a common gravity roller or belt conveyor and then carried to some other part of the bricl matting plant for storage or removal.

Flo tar l are aware it is broadly new in brick or block nnlinqr machines to provide tor the continuous inc: ot the molds and the continuous jar "in r ot the same While the molds are tilled. theja i-iii action ograilir ally diminishii W; trom tie time the inohlii are t lled until the in chest is entered. l ly the ar 'aiureinent oi the hopper. the s iielth the rollers and the traveling; carrier with the molds, when the rails are raised by the jigging}; mechanism. the molds. the arm the rollers. and the shield are all ultaneouely reised. and since the con- .OljG materia contained Within the shield and on the material in the mold, it

. y W movements at the ji 'ing inechauisui. Ml the While the concrete is damp plastic. and when. the molds. with the material, enter the steam: che t. the material is still plastic. lit will be undia'stiod. o'l't cmirse. that. not until the last 1". bar entered the steam chest doe; he iar so that all the suhjecte ilae same it old in h to hill ramming actionwhich is quite severe "at first, but gradually decreases to a slight movement until the steam chest is reached. This operation results in the production of bricks or blocks having great density and strength and a corresponding improvement in the product. I

Another feature of importance is that the side walls 58 and 60 of the molds are higher than the cross division plates 73 (see Fig. 14), so that the notched or slotted sleeve 47 of the hopper also rollers 49 and 50, engage with the upper ends of the side walls. maintaining them in proper shape. so that they may not move sidewise, which results in producingblocks which are true to shape and size. Said sleeve also acts as a strike-off at rear side. cutting ofl surplus concrete and keeping same within hopper and sleeve. I 'As shown more particularly in Fig. 20,11 filler 194, which may be of wood or any suitable materiahis bolted to the inside of the upper edge of the entrance of the curing ch'amber 23. having its lower edge beveled to engage the upper edge of the door 98 when said door is closed. The lower edge of the door is likewise beveled so that said edge will lie in flat engagement upon "the portion 1.96, built up trom'the floor of the chamber at the entrance to said chamber and constructed of any suitable material. Side cleats or ledges 197 are provided for the door to abut against in order to more thoroughly seal the door when closed.

From the bottom edge of the doors 98 and 99 extend upwardly a pair of spaced slots through which the spaced rails 26 extend when the doors are in closed position. v The slot-s are just wide enough to fit the rails. without binding, to prevent the escape of steam at these points. The construction'and mounting of door 99 is similar to'the mounting and constructionof door 98.

Heavy hinges 198 are secured toend Walls of the curing chamber 23 for supportingthe doors 98 and 99 in swinging position. the securing bolts for the hinges passing through the tiller 194 and the end tvall.

\Vhen the bases of a row of molds are flexed by the transverse member 66. as shown in Figs. 14 and 15, the end sides of a row of molds will swing upon the pivot point 64, and which I consider the neutral point. The neutral point is that exact point between the upper and l wer edges of the end sides of the molds 'at which said end sides must be pivoted in order that the lower edges of the end sides of the mold. will swing inwardly towards each other just a proper distance to rent the bases of a row of molds to flex sufficiently to meet the, curvature the gcrowned upperedges ofthe ti 'nsver bars ether word's-as the usher the end sides of the molds travel outwardly, the lower edges of said end sides travel inwardly, but not nearly so far, because the top edges require a much greater travel. The positioning of the hinge pin 64 is important and should be placed at the neutral point to prevent any strains on the links of the traveling carrier and its related parts when the bases of a row of molds are flexed by the crowned bars 86.

Where a very large output is required. I use a series of: machines. as has been explained. but in communities which could not al sorb a very large output. I propose to use one machine of either the hollow or solid brick type, or both kinds. if desired. placing upon said single machine a full equipment of molds; that is, the endless chain having every link fitted with a row of molds. A hopper is installed over the molds in the same manner as in the series machine. but is a stationary instead of a traveling type. The unloading device is permanently installed at the rear end of the machine. This single machine may be operated continuously it required. there being three shifts of workmen employed every twenty-four hours. as in the case of a battery of machines.

ln the single machine type. the length of the curing chamber wou d be necessarily cX tended and the mold carrier run at a slower rate of speed. so that the bricks would have several hours of curing while passing through the chamber. Tn other words. it would require several hours for filled molds to pass through the uring chamber and out at the rear end of the same here the cured bricks wi l be unloaded. continuous operation will therefore be had in this manner with a single machine.- as has been explained in reference to a battery of machines. ln the single machine. it. necessary. a motor may be employed at each end to drive the sprockets and these motors will therefore be driven synchronously.

Vhere a single machine is used. the doors 98, 99 wi l be entirely unnecessary: and therefore I propose to employ a tiller at curb end of the curing chamber which will fit as neatly as possible about the traveling carrier. the rails and the molds. without cau ing friction between these moving e ements and the tiller or wear on the sam". but which will prevent loss of steam iron] the curing chum her. This filler will extend for several feel lengthwise of the chamber and inwa dly from each end of the same SO that the clnls of cross division plates will come in con tact. ith this extended fil er at many places at the same time. thus having the same efi'ect |s though the molds and carrier had smooth even sides, The fi ler may be made ofwood or some compositionand contacts with so many molds at the same time as to seal the ourl ll) ins chamber from the atmosphere to a very fair degree and without causing any undue wear on the molds.

As shown in Fig. 19, the upper portion 199 of the tiller is provided with notch-es 200 through which the intermediate sides and the end sides of the molds will pass. The lower portion 201 at the filler is provided with grooves 202 in which are inserted the rails 26 and through which, likewise, the wheels of the traveling carrier pass. Side portions 203 of the filler engage the cross division plates as the molds travel through the entrance. The outer end of the filler is beveled, as shown at 204:. at the point where the molds and traveling carrier enter the filler so that no abrupt edges will app-ear and cause injury to the molds of the traveling carrier.

In practice, I employ a roller on the inner face of the rear door 99, which is similar to the roller 4C9 on the front door 98, and which is adapted to revolve on the tops of. the molds to prevent undue wear and triction on the door and IIlOlC s as the molds pass out of the curing chamber 23-), This roller has no manufacturers imprint. The .roller is adapted to engage the dummy mounted on the traveling carrier in advance of the first row of mold SO that the roller will revolve as it slides on the inclined surface of the dummy when the door is being opened by the moving molds.

When using a single machine, the jigging; mechanism connected with the hopper mav he located. underneath the track upon which the molds travel instead of upon the hopper :lrame.

hat is claimed, is

1. In a machine for making concrete hl oclszs. a traveling carrier having molds, a hopper mounted above the molds and adapted to till the some, means for jarring and ramming: the concrete in the molds, a closed chamber into which. the traveling carrier with the molds are admitted for curing the hloclts, means for supplying the chamber with steam, means for causing the contraction of the molds atter leaving said. chan'iheix and means For picltiuo the cured hriclrs From the pen niolds ol' the traveling carrier.

52;. In a machine for making concrete blocks, an endless traveling carrier provided with a plurality of molds, a hopper roou ed above the carrier for lillingthe molds, and means adapted to periodically raise and suddenly drop a portion of the traveling carrier and the molds simultaneuosly with the tilling of the molds.

3. In a machine for making concrete blocks, an endless traveling carrier provided with a plurality of molds, a hopper mounted above the traveling carrier for filling the molds, latter being e l-awed hel -hr the bottom of the hopper, and means associated with the hopper and ad apt-ed to periodically raise and suddenly drop a portion of the traveling}; carrier and the molds connected therewith simultaneously with the filling of the molds, said means being adapted to elerate and. drop the filling material. in the hopper at the same time.

4: ln a machine for making hloclls, an endless traveling carrier provided with a plurality of rows of molds, a hopper n'iounted above the traveling carrier For filling the molds with concrete, means adapted to periodically raise and suddenly drop a portion of the :1. veling; carrier and the molds connected therewith, andv a sleeve slidahlv mounted. on the bottom ol the hopper and adapted to estnhrace a plurality of rows ot molds.

IS, lln a machine tor making concrete blot s, an endless travelin,,.; car r provided with a plurality of rows of molr I a hopper mounted above the traveling carrier for filling the molds with concrete, means adapted to periodically raise and suddenly drop a portion of the traveling); carrier and the molds connected therewith. and a sleeve slidahlv mounted on the hotlom ol the hopper and adapted to emhrace a pluralitv of rows of molds said sleeve heii apted to rest upon the top of the molds am. rnrovided with a plura 'Qtv ot notches to receive certain of the walls oli the molds.

ll, lo a machine For u'iali'i up; ronrretc l locl an endless traveli carrier provided with a plurality of r s o nolds, hopper mormted above the traveling carrio' tor filling the molds with concrete, andv a sleeve slidahl; mounted on and surrounding the bottom portion oil the hopper and adapted to embrace a plurality of rows of molds 7. ln a machine tor making: cone lilorlrs,

Hie-

rte an endless traveling: carrier provided.

concrete 1 with a pluralitv of rows 0'? molds, a hormer mounted above the traveling carrier for filling the molds with crmrrete, and a sleeve slid-- ahlv mounted on the bottom of? the hopper and a daptod to embrace a plural ity of rows f? molds, said sleeve telescoping the bottom l the hopper and having; its lower edge Formed with a plru'ality oit' notches to eupgane certain oi the walls of the inoldsjto aline the same.

ln a iuachiiw tor lil'll-Tllh'jf coil- We r hloclts, an endless traveling; carrier provided with a p uralitv oi" rows oil n'iolds, hopper mounted aliiove the traveling carrier torfilL ing the molds with concrete. and a sleeve Vdahlv mounted on the hottom of the hopper and adapted to emhrace a plurality of rows oi molds, said sleeve hemp; provided lo a mac c usin's. 

